BA6438S

BA6438S Motor driver ICs 3-phase motor driver BA6438S The BA6438S is a 3-phase, full-wave, pseudo-linear motor driver suited for VCR capstan motors. The IC has a torque ripple cancellation circuit to reduce wow and flutter, and an output transistor saturation prevention circuit that provides superb motor control over a wide range of current. The built-in motor power switching regulator allows applications with low power consumption !Applications 3-phase VCR capstan motors !Features 1) 3-phase, full-wave, pseudo-linear drive system. 2) Torque ripple cancellation circuit. 3) Reversal brake based on the detection of motor direction. 4) Output transistor (high-and low-sides) saturation prevention circuit 5) Motor power switching regulator with oscillation circuit. 6) Output-to-GND short-circuit detection. 7) Available in SDIP 24-pin power package (with radiation fins). !Absolute maximum ratings (Ta = 25°C) Parameter Applied voltage Applied voltage Power dissipation Operating temperature Storage temperature Allowable output current Symbol VCC VM Pd Topr Tstg IOpeak Limits 7 24 2000 ∗1 −10 ∼ +75 −40 ∼ +150 1.7 ∗2 Unit V V mW °C °C A ∗1 ∗2 Reduced by 16mW for each increase in Ta of 1°C over 25°C. Should not exceed the ASO value. !Recommended operating conditions (Ta = 25°C) Parameter Operating power supply voltage Operating power supply voltage Symbol VCC VM Min. 4 3 Typ. 5 12 Max. 6 23 Unit V V BA6438S Motor driver ICs !Block diagram SIGNAL VCC MOTOR VCC CONTROL SIGNAL...